Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual data mostra o resultado do vencedor contra Nikola Fraňková Carmen Klaschka?
 ###Tabelas: CREATE TABLE doubles_4–2 (doubles_4–2_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents in the final VARCHAR, Score VARCHAR) CREATE TABLE "sandy_bridge_quad-core"_32_nm ("sandy_bridge_quad-core"_32_nm_id AUTO_INCREMENT PRIMARY KEY, Model number VARCHAR, sSpec number VARCHAR, Cores VARCHAR, Frequency VARCHAR, Turbo VARCHAR, L2 cache VARCHAR, L3 cache VARCHAR, GPU model VARCHAR, GPU frequency VARCHAR, Socket VARCHAR, I/O bus VARCHAR, Release date VARCHAR, Part number(s) VARCHAR, Release price ( USD ) VARCHAR) CREATE TABLE summary_of_election_results_1973_-_2003 (summary_of_election_results_1973_-_2003_id AUTO_INCREMENT PRIMARY KEY, Election INT, Labour INT, Conservative INT, Liberal INT, Social Democratic Party INT, Social and Liberal Democrats/ Liberal Democrats INT, Independent INT, Green INT, Other VARCHAR, Control VARCHAR) CREATE TABLE india (india_id AUTO_INCREMENT PRIMARY KEY, Dibrugarh VARCHAR, Kanyakumari VARCHAR, Vivek Express /15905/15906 VARCHAR, Indian Railways VARCHAR, 4286km VARCHAR, 55 INT, Weekly VARCHAR, 82.30 hrs(~3.5 days) VARCHAR) CREATE TABLE season_averages (season_averages_id AUTO_INCREMENT PRIMARY KEY, Season INT, Total Attendance INT, Games INT, Average INT, High avg. INT, Team VARCHAR, No. Of Clubs INT)  
SELECT Date FROM doubles_4–2 WHERE Outcome = winner AND Opponents in the final = nikola fraňková carmen klaschka